The centaurs of Greek mythology are creatures that are part human and part horse. They are usually portrayed with the torso and head of a human, and the body of a horse. Centaurs are the followers of the wine god Dionysus and are well known for drunkenness and carrying off helpless young maidens.
If both healthy parents carry the same altered recessive. gene, then each child they have has a 25% (1 in 4) risk of. inheriting the altered gene from both parents and therefore. being affected. For each child, regardless of their sex, the. risk is the same = 25%. Children of couples who are both carriers of the same. altered recessive gene have a 50% (1 in 2) chance of. inheriting one copy of the altered gene from one of their. parents. If this happens, they are healthy carriers. themselves.
Remember that there are two copies of each gene in a genome. For a recessive trait to be expressed, you would have two have two copies of the recessive gene. If you had one recessive and one dominant, then the dominant trait would be expressed. For example, brown eyes are the dominant trait and blue is recessive. If you had a brown eye gene and a blue eye gene, brown would be expressed. You would need two blue eye genes to express that trait.